Capacity and state-of-charge estimation for a multi-battery energy storage system

Abstract

A method of computing a state of charge of an energy storage system, ESS, with multiple parallel battery packs is provided. The method includes for each battery pack, predicting a time-evolved terminal voltage and current based on a respective measured terminal voltage; based on the predicted time-evolved terminal voltages and currents, computing a chargeable and/or dischargeable capacity of the ESS; and computing the state of charge of the ESS based on the chargeable and/or dischargeable capacity of the ESS. The method may seek to provide an accurate computation of SoC for an ESS with multiple parallel battery packs such that the full capability of the ESS is utilized.

Dependencies are inferred from the claim text.